body {
    background: linear-gradient(135deg, #4e73df 0%, #2e59d9 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
}
.card {
    border-radius: 1rem;
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}
.card-header {
    background-color: #fff;
    border-bottom: none;
    text-align: center;
    padding: 2rem;
    border-top-left-radius: 1rem;
    border-top-right-radius: 1rem;
}
.card-body {
    padding: 2rem;
}
.btn-primary {
    background-color: #4e73df;
    border-color: #4e73df;
    transition: all 0.3s ease;
}
.btn-primary:hover {
    background-color: #2e59d9;
    border-color: #2e59d9;
    transform: translateY(-2px);
}
.btn-secondary {
    transition: all 0.3s ease;
}
.btn-secondary:hover {
    transform: translateY(-2px);
}